Device for drawing off welts



Jan. 12, 1943. O,

DEVICEZFQR nmwme oF wsms Filed Aug. 9, 1940 2 Sheets-Sheet l Oscar WarmPatented Jan. 12, 1943 UNITED STATES rant" Fl C Oscar Worm, Chemnitz,Germany; vested in the Alien Property Custodian Application August 9,1940, Serial No. 352,031 In Germany August 9, 1939 3 Claims.

The present invention relates to a device used on fiat knitting machinesfor drawing off welts.

In a known device in which the welt bars are commonly connected to thedrawing off elements a first system of drawing ofi straps provided withhooks holding the welt bars and a second system of straps for returningthe hooks into the position ready for receiving the welt bars areprovided in a manner known per se. This second system of straps isconnected to the first system of straps in such a manner that on windingup of the second system of straps the first system of straps is unwoundor vice versa.

During the entire drawing off period resistances of the second system ofstraps used for returning the hooks into the position ready forreceiving the welt bars are to be overcome, whereby the sensitivity ofthe draw off or take up is disadvantageously influenced.

This drawback is obviated in accordance with the invention by the factthat for commonly connecting all the welt bars to the drawing offapparatus, independent endless chains with hooks are used to bring thehooks of the drawing off system of straps into the position ready forreceiving the welt bars.

In the accompanying drawings some constructions of devices according tothe invention are shown by way of example.

In the drawings:

Fig. 1 is a side elevation of the entire drawing oif apparatus in thestarting position for returning the hooks of the system of straps intothe position ready for receiving the welt bars,

Fig. 2 also is a side elevation showing the individual elements of thedevice in an intermediate position during the return movement of thehooks,

Fig. 3 is a detail view, showing the hooks for holding the welt bar inthe end position,

Figs. 4 to 6 are detail views of the means for returning the hooksreceiving the welt bars in which Fig. 4 shows the return movement of thehooks receiving the welt bars arranged at a separate system of straps ineach division,

Fig. 5 is a section on line VV of Fig. 4,

Fig. 6 shows the return movement of the hooks receiving the welt bararranged at a system of straps in each division connected together by abar, and Fig. 7 is a detail sectional perspective View of a fiatknitting machine having the invention applied thereto.

At the ends of each division of a knitting machine guide rollers II and5 are mounted upon shafts I and 2 respectively extending over the entirelength of the machine, whereas at each end of each division a sprocketwheel 6 is fixed to a shaft 3 also extending over the entire length ofthe machine. Endless chains I pass round the sprocket wheels 6 and thecorresponding guide rollers 4 and 5. The rollers 4 and 5- are rotatablymounted upon the shafts I and 2 respectively, whereas the sprocketwheels 6 are fixed to the shaft 3. Hooks 8 are fixed to the chains I.

Fixed to the shaft 9 of the fabric roller, also extending over theentire length of the knitting machine and in parallel to the shafts I, 2and 3, are fabric rollers I I one for each division of the machine whichin a well known manner are provided with drawing ofi straps I0. carryhooks I2 for receiving the welt bars I3 shown in Fig. 3. The two hooksI2 provided in each division of the machine either are arranged atmembers I4 separated from each other or may be connected together bymeans of a bar I5. Each of the members I4 of the hooks I2 separated fromeach other is provided with an eye or a stirrup I6 as shown in Fig. 4,and each of the bars I5 of the hooks I2 connected to each other isprovided with recesses II into which the hooks 8 of the chains I mayengage as is shown in Fig. 6.

The operation of the device according to the invention is as follows:

After removal of the finished stocking legs which in a manner known perse are wound upon a fabric roller II, the latter are rotated in such amanner that the drawing off straps III occupy the position shown in Fig.1 in which they are suspended downwardly. The chains I together withtheir hooks 8 are also brought into the position shown in Fig. 1.

By rotating shaft 3 and therewith the sprocket wheels 6 in ananti-clockwise direction, the hooks 8 of each of the chains I drop intothe corresponding eyes or stirrups It as shown in Fig. 4 or into thecorresponding recesses II of the bar I5 connecting the hooks I2 asillustrated in Fig. 6 respectively and carry with them the hooks I2.Hereby the drawing oif straps l0 connected to the hooks I2 also aremoved and brought first into the position shown in Fig. 2 and then intothe final position illustrated in Fig. 3 which latter represents theposition ready for receiving the welt bars l3. Thereupon the chains Iare returned into their starting position shown in Fig. 1.

To obtain a better guidance of the drawing 01f The latter I straps I!)the fabric rollers H may be provided with corresponding incisions ornotches.

What I claim is:

1. In a device used on flat knitting machines for drawing ofi welts, afabric shaft, fabric rollers mounted on said fabric shaft, a system ofstraps for drawing off welt bars connected to .each of said fabricrollers, hooks adapted to receive said welt bars carried by said systemfor drawing oiT welt bars, endless chains operating independently onsaid drawing off device for connecting all said welt bars to saiddrawing oif device, and hooks provided at said endless chains, saidhooks returning said hooks adapted to receive said welt bars carried bysaid system 15 of straps for drawing off welt bars into the positionready for receiving said welt bars.

2. A device as set forth in claim 1 in which said hooks of said systemof straps for drawing ofi welt bars are provided at members carryingeyes into which engage said hooks provided at said endless chains.

3. A device as set forth in claim 1 in which said hooks of said systemof straps for drawing off welt bars are provided at a bar connectingsaid hooks, said connecting bar being provided with recesses into whichengage said hooks of said endless chains.

OSCAR WORM.

